Heating unit



Feb, 18, i936. w. R. MILLER 0339498 HEATING UNIT v `original Filed Jan. 25, 1952 yum-:55 y

- ATTORNEYS.

Patented Feb. 18, 1936 UNETE HEATING UNIT William R. Miller, Passai F. Van Seggern,

Application January 23,

c, N. J., assigner to Ray Maplewood, N. J.

1932, Serial No. 588,435

Renewed October 14, 1933 3 Claims.

This invention relates. to heating devices and. particularly to improved heating units for heating stoves, furnaces and the like, the object being to provide a construction coacting with a burner utilizing oil as a fuel, the device being capable of application to either new or old furnaces or other heating apparatus.

Another object of the invention is to provide a heating unit which may be bodily applied and removed from the fire box of a steam, hot water or other heating furnace.

An additional object of the invention is to provide an improved heating unit for use in connection with an oil burner and for placing the water carrying members directly in thel ame of the burner so as to utilize the intense heat from the ame, the structure being such as to be readily applied to either new or old furnaces Without materially changing the furnace, so that the usual connections of the furnace may be used.

In the accompanying drawing,

Figure 1 is a View partly in section illustrating an embodiment of the invention applied to a conventional steam heating furnace used in dwellings and other places.

Figure 2 is an enlarged fragmentary sectional view through Figure 1 on line 2-2.

Referring to the accompanying drawing by numerals, I indicates an ordinary furnace now in common use, the same being provided with the usual smoke outlet 2, fire box or chamber 3, ash pit or compartment 4 and heating sections 5. The heating sections 5 are adapted to carry the water and steam, the upper part of the sections 5 being connected to the steam outlet 6 in any desired way, while the cold water inlet l connects with the sections 5 in any desired way to supply Water to the furnace. Pipe l is usually connected to the return pipes from the various radiators to which pipe 6 is connected so that the condensed steam will return to the boiler and consequently a small quantity of new water may be used and may be admitted from time to time. All the parts just described are old and well known and form no part of the present invention except in combination.

In furnaces of the kind shown, there is usually provided a grate, as for instance grate 8. In the' present showing, this grate is removed completely or bodily and a vertical wall 9 provided, said Wall merging into the inclined section I0 and a horizontal section II on which certain of the pipes I2 rest. This arrangement is such as to deect the ame I3 from the oil burner I4 upwardly intothe fire box or chamber 3. The oil burner I4 may be of any desired type, as for instance, one of the kind now in common use on the market which provides a large flame. As the flame is discharged substantially horizontally as shown in Figure 1, it will gradually turn upwardly and strike the wall 9 with the offset 9 and be deflected substantially centrally of the various pipes I2 so that the pipes I2 are positioned at the point of most intense heat. If these pipes were removed and only the heating sections 5 were utilized, certain re- 10 sults would be secured, but they would not be entirely satisfactory because of the distance they are from the flame. Heretofore, under some circumstances, the oil burner I4 has been positioned to throw the ame upwardly at a 45 angle or some other angle but this produced an undesirably hot area for one or two sections 5. while the others were barely warmed. In View of these disadvantages, the burner when so positioned produced only partially satisfactory results as a large part of the heat was not utilized. By providing a group of pipes I2 as shown in Figures l and 2, the steam circulates through the pipes and these pipes receive water from the header I5, which header is connected through a suitable connecting pipe I6 to a transverse header I'I to which one end of all the pipes I 2 and I 2 are connected. The opposite ends of all these pipes are connected to the upper front header I8 which is connected through one or more pipes I9 to the pipe 20 which in turn is connected to the upper part of the sections 5 thus permitting the hot Water to be discharged at an upper point and thereby permit the escaping steam to ll the upper part of the sections 5 and pass out through the pipe 6 as desired. It will be understood that the auxiliary transverse sections 5 are in free communication with the vertical end portions of sections 5 so that any steam given off from these auxiliary sections will be directed to the upper part of each section 5. It will be understood that sections 5 and 5' are old and well known and that merely the pipes I S and 20 are connected to the top and bottom of these old and well known structures.

It will also be evident that the heating unit could be applied to furnaces of other types and connected to the top and bottom part thereof so as to provide a more rapid circulation of water and consequently a more rapid circulation of steam or hot water with the minimum amount of heat. The unburnt products of combustion from the burner, if any, will pass out through the smoke passageway 2 in the usual manner.

When mounting the device in a boiler 2, the :tire box door is completely removed and another door 2l is substituted, the same being of metal, asbestos or other material and constructed to agree with the particular door opening o-f the furnace. This is merely to prevent a draft at this point and consequently to permit the flame and heat to travel substantially as shown by the arrows in Figure l. Preferably the pipes l2 and l2' are spaced a short distance apart as illustrated in Figure 2, and by their offset arrangement the flame will pass substantially around each of the pipes and thus the pipes may absorb quickly the heat from the flame.

I claim:

1. A heating apparatus including a furnace having a boiler, a re box and an ash pit, an oil burner for projecting name substantially horizontally into the ash pit, baffling means for deflecting said flame into the fire box and into a direction to cause the flame to move substantially vertically, a plurality of sets of tubes arranged in said fire box in the path of said flame, the ends of the respective sets of tubes being connected to a lower header outside of said furnace, the outlet ends of said sets of tubes being connected to an upper header and tubular means for connecting the respective headers to said boiler at the top and bottom thereof.

2. A heating unit for steam, vapor and hot water heating furnaces including a plurality of U-shaped pipes adapted to be removably positioned in the re box of a furnace, each pipe having a U-shaped section having upper and lower runs and an offset section at the end of each run, said pipes being arranged in a lower group and an upper group with the upper runs of the upper group near the upper runs of the lower group, the pipes of the upper group being respectively positioned between pipes of the lower group, a pair of outside headers, one header being connected to one end of each of said pipes, and the other header being connected to the other end of each of said pipes, and tubular means extending from the heater to the top and bottom portions respectively of said furnace,

3. In combination with a boiler having a combustion space therein, water legs extending downwardly about said space and a fire door opening communicating with the upper portion of said combustion space, an oil burner discharging flame and products of combustion substantially horizontally into the lower portion of said combustion space, refractory material located in the lower portion of said space against which said flame is projected and from which said flame passes substantially vertically upward through the combustion space, a supplemental heating device having a water receiving body at least a portion of which is located in the upper portion of said space and extends horizontally above said refractory material and transversely of flame and products of combustion passing vertically therefrom, means conducting water from the lower portion of the water legs to the horizontally extending portion of said water receiving body connected to the exterior of the water legs near the bottom thereof and passing through the lower part of said fire door opening to the horizontal portion of the water receiving body and other means conducting water from said horizontally extending portion to the upper part of the boiler extending from said portion through the upper part of said iire door opening and connected to the exterior of the upper portion of the boiler, said supplemental heating device and means constituting a path through which boiler water is circulated by convection from the lower portion of the water legs through said water receiving body to the upper portion of the boiler.

WILLIAM R. MILLER.

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